Grand Seiko 9F62

Grand Seiko's legendary high-accuracy quartz caliber rated to plus or minus 10 seconds per year, far exceeding standard quartz accuracy. Features an aged quartz crystal selected by individual testing, a twin-pulse control system for precise hand movement, and a backlash auto-adjust mechanism that eliminates gear play. The 9F series redefined what quartz could achieve and remains among the finest quartz movements ever produced.